The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2012
Filed:
Oct. 16, 2008
Hiroki Gofuku, Tokyo, JP;
Yuki Kuwauchi, Tokyo, JP;
Wataru Nagai, Tokyo, JP;
Kazuhisa Fukuda, Tokyo, JP;
Takashi Sawai, Tokyo, JP;
Hiroki Gofuku, Tokyo, JP;
Yuki Kuwauchi, Tokyo, JP;
Wataru Nagai, Tokyo, JP;
Kazuhisa Fukuda, Tokyo, JP;
Takashi Sawai, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A producing method of direct reduced iron includes the steps of: drying an oxidized iron raw material selected from a group including iron ore and iron-making dust generated in an iron-making process to have a predetermined moisture content; mixing the oxidized iron raw material subjected to the drying step and a reducing material having a predetermined moisture content to obtain a mixture; pulverizing the mixture obtained in the mixing step for 80% minus-sieve to have a particle diameter of 70 μm to 500 μm; kneading the mixture after the moisture content of the mixture subjected to the pulverizing step is adjusted; agglomerating the mixture subjected to the kneading step to be agglomerate; and reducing the agglomerate obtained in the agglomerating step by a rotary hearth furnace to generate direct reduced iron.